US2661677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Register frame
Assignee: Individual
•
Filing: 1948-09-03
•
Granted: 1953-12-08
•
Expires: 1968-09-03
Abstract
No abstract record available.
Inventors
- 👤 Lingelbach Richard Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:51
CPC Classifications
E; E06; E06B; E06B7/00; E06B7/02; E06B7/08; Y; Y10; Y10S; Y10S248/00; Y10S248/906; Y10S248/909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1211182A
Cited
US1523268A
Cited
US1790031A
Cited
US2011797A
Cited
US2130839A
Cited
US2276139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |